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针对保偏光纤陀螺静态参数受光路偏振串扰误差的影响而使陀螺精度受到制约的问题,从实际应用的角度,研究了保偏光纤陀螺光路中由于各光学器件不理想和熔接点对轴角度误差等因素引起偏振串扰误差的机制。基于琼斯矩阵和相干矩阵,并引入随温度变化的保偏光纤双折射变量,建立了变温环境下保偏光纤陀螺的光路传输模型,对变温环境下偏振串扰误差对保偏光纤陀螺零漂和随机游走的影响进行了理论分析和估算。同时开展了变温环境下光纤环偏振串扰对其静态参数影响的相关实验。实验结果与模型分析结果基本一致,表明该模型是合理的。
Aiming at the problem that the gyro’s accuracy is restricted by the influence of the polarization crosstalk error of the polarization maintaining of polarization maintaining fiber optic gyroscope, from the angle of practical application, the optical path of polarization- Factors such as polarization crosstalk error caused by the mechanism. Based on the Jones matrix and the coherence matrix and introducing the birefringence variation of the polarization-maintaining fiber with temperature, the optical transmission model of the polarization-preserving fiber optic gyroscope is established. The polarization crosstalk error and polarization- The impact of migration has been theoretically analyzed and estimated. At the same time, we carried out experiments on the influence of the polarization crosstalk of the fiber ring on the static parameters under variable temperature conditions. The experimental results are basically consistent with the results of the model analysis, indicating that the model is reasonable.